Joint Optimization of Radio and Computational Resource Allocation in Uplink NOMA-Based Remote State Estimation

• Published in: Sensors (Basel, Switzerland) Vol. 25; no. 15; p. 4686
• Main Authors: Li, Rongzhen, Xu, Lei
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 29.07.2025; MDPI
• Subjects: Approximation; Bandwidths; coalitioin game; Communication; Convex analysis; dinkelbach method; Efficiency; Energy consumption; Game theory; Optimization algorithms; outage risk; Probability; remote state estimation; Sensors; successive convex approximation method; uplink NOMA; Wireless networks; remote state estimation; successive convex approximation method; outage risk; uplink NOMA; coalitioin game; dinkelbach method; dual decomposition method
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s25154686

In industrial wireless networks beyond 5G and toward 6G, combining uplink non-orthogonal multiple access (NOMA) with the Kalman filter (KF) effectively reduces interruption risks and transmission delays in remote state estimation. However, the complexity of wireless environments and concurrent multi-sensor transmissions introduce significant interference and latency, impairing the KF’s ability to continuously obtain reliable observations. Meanwhile, existing remote state estimation systems typically rely on oversimplified wireless communication models, unable to adequately handle the dynamics and interference in realistic network scenarios. To address these limitations, this paper formulates a novel dynamic wireless resource allocation problem as a mixed-integer nonlinear programming (MINLP) model. By jointly optimizing sensor grouping and power allocation—considering sensor available power and outage probability constraints—the proposed scheme minimizes both estimation outage and transmission delay. Simulation results demonstrate that, compared to conventional approaches, our method significantly improves transmission reliability and KF estimation performance, thus providing robust technical support for remote state estimation in next-generation industrial wireless networks.